Nashorn - How to get a JS Array in Java?

Question

I have this JS function:

function newJSArray() {return []}

That I am trying to return in Java using the following method:

public static NativeArray newArray() throws Exception {
    return (NativeArray)invocable.invokeFunction("newJSArray");
}

But it's throwing an exception when I try to invoke this function:

Exception in thread "main" java.lang.NoSuchMethodError: ....JavaScript.newArray()Ljdk/nashorn/api/scripting/JSObject;
    at ....

I want to be given a JS array specifically so I can call jsArr1.concat(jsArr2).

A. Sundararajan · Accepted Answer · 2015-11-04 03:39:37Z

2

Yes, all API methods return JavaScript objects as instances of jdk.nashorn.api.scripting.JSObject. You can access members of that JS array by JSObject.getSlot method.

answered Nov 4, 2015 at 3:39

A. Sundararajan

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Comments

Ben · Accepted Answer · 2015-11-03 07:18:26Z

0

Found out that the object returned was a JSObject.

answered Nov 3, 2015 at 7:18

Ben

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